PATHETIC COMPANY POLICY

I have been banking with FNB since 1977. I have a Visa credit card which presently has a credit balance (I DO NOT OWE THE BANK ANY MONEY), but the credit card division blocked my account. Upon enquiring today (Ref Rj ***), I was told that a payment of R181-00 due on the 5th September was not paid. I totally disagree with them as R9947.00 was credited to my firstcard account on 17-8-2020 and my account is in CREDIT.(THIS MEANS I OWE YOU NOTHING). The staff member concerned said that she dosen't understand much and if I want my account unblocked I need to pay in, which just increases my credit balance even further. FNB Card Division needs to carefully look at their policies as I was totally inconvenienced by their actions which has a stupid explanation.